| 摘要 |
A surface cutting attachment for a powered floor abrading or polishing machine, said attachment having a plurality of frusto-conical blades releasable secured in a support having a complimentary frusto-conical socket. Upon the cutting edge becoming worn the frusto-conical blade can be rotated to present a previously unused part of the annular cutting edge. The blades are mounted on a rotatable plate in equally spaced circumferential intervals and a plurality of plates are rotatably mounted at equally spaced circumferential intervals on a power drive disc.
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